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0.0
Dec 20, 2019
12/19
by
Ralf Neuhäuser
audio
eye 0
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Auphonic (iPhone), Podlove, WordPress und iTunes miteinander verbunden und erste Episode veröffentlicht.
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343
Dec 7, 2006
12/06
by
Neuhauser, Eduard
texts
eye 343
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Book from Project Gutenberg: Altenahr en zijn omgeving: De Aarde en haar Volken, 1907-Also includes a short article "Bekoring van het Matterhornland" by J. C. Heer
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19
Mar 29, 2012
03/12
by
Peg Neuhauser
texts
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Topics: Corporate culture, Electronic commerce -- Management, Knowledge management, Information technology...
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313
Jun 20, 2019
06/19
by
Joseph Neuhäuser
audio
eye 313
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comment 0
Westerwald Marsch is a marching song that originated from a traditional German Folk song. It was composed in 1932 in the mountain range of Westerwald.
Topics: march, germany, 1930, mountain, Westerwald
0
0.0
Feb 18, 2020
02/20
by
Ralf Neuhäuser
audio
eye 0
favorite 0
comment 0
Auphonic (iPhone), Podlove, WordPress und iTunes miteinander verbunden und erste Episode veröffentlicht.
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8.0
Jan 6, 2020
01/20
by
Gabriele Neuhäuser
texts
eye 8
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E. Weinberg
Topics: Jews, Diplomas
Source: folio
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9.0
Jan 6, 2020
01/20
by
Gabriele Neuhäuser
texts
eye 9
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comment 0
3
3.0
Dec 20, 2019
12/19
by
Ralf Neuhäuser
Über Dinge, die ich erlebe - in Düsseldorf, auf meinen Wegen, mit den Menschen, denen ich begegne Archived from iTunes at https://itunes.apple.com/us/podcast/sapere-aude/id1312951399. Items in this collection are restricted.
Topics: podcast, itunes, apple
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Topics: Anaximander, Philosophy, Ancient, genealogy
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Nov 23, 2019
11/19
by
Neuhauser, Claudia, 1962-
texts
eye 72
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comment 0
1 volume (various pagings) : 26 cm
Topics: Biomathematics, Medicine -- Mathematics, Mathematics, Biomathematics, Medicine -- Mathematics
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49
Aug 8, 2011
08/11
by
Neuhauser, Peg, 1950-
texts
eye 49
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comment 0
Bibliography: p. 209-213
Topic: Conflict management
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2.0
Oct 21, 2020
10/20
by
Neuhauser, Robert G
texts
eye 2
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comment 0
x, 321 pages ; 24 cm
Topics: Creation, Creationism, Religion and science
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37
Mar 16, 2010
03/10
by
Neuhauser, Peg, 1950-
texts
eye 37
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Includes bibliographical references (p. 221-229) and index
Topics: Communication in management, Communication in organizations, Corporate culture, Communicatie,...
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34
Dec 13, 2011
12/11
by
Neuhauser, Peg, 1950-
texts
eye 34
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Includes bibliographical references (p. [199]-200) and index
Topic: Success in business
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13
Apr 10, 2018
04/18
by
Neuhauser, Duncan, 1939-
texts
eye 13
favorite 0
comment 0
Includes bibliographical references (pages 243-279)
Topics: American College of Hospital Administrators, American College of Hospital Administrators, American...
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1.0
Jul 8, 2019
07/19
by
Neuhauser, Kurt (arr)
texts
eye 1
favorite 0
comment 0
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47
Sep 18, 2013
09/13
by
Viki Joergens; Ralph Neuhäuser
texts
eye 47
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We have carried out a radial velocity (RV) search for planets and brown dwarf companions to very young (1-10Myr) brown dwarfs and very low-mass stars in the ChaI star forming region. This survey has been carried out with the high-resolution Echelle spectrograph UVES at the VLT. It is sensitive down to Jupiter mass planets. Out of the twelve monitored very low-mass stars and brown dwarfs, ten have constant RVs in the presented RV survey. This hints at a small multiplicity fraction of the studied...
Source: http://arxiv.org/abs/astro-ph/0306458v1
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44
Sep 21, 2013
09/13
by
Ralph Neuhäuser; Jan Forbrich
texts
eye 44
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At a distance of about 130 pc, the Corona Australis molecular cloud complex is one of the nearest regions with ongoing and/or recent star formation. It is a region with highly variable extinction of up to AV~45 mag, containing, at its core, the Coronet protostar cluster. There are now 55 known optically detected members, starting at late B spectral types. At the opposite end of the mass spectrum, there are two confirmed brown dwarf members and seven more candidate brown dwarfs. The CrA region...
Source: http://arxiv.org/abs/0808.3374v1
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42
Sep 19, 2013
09/13
by
N. Lanchier; C. Neuhauser
texts
eye 42
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We introduce a spatially explicit model for the competition between type $a$ and type $b$ alleles. Each vertex of the $d$-dimensional integer lattice is occupied by a diploid individual, which is in one of three possible states or genotypes: $aa$, $ab$ or $bb$. We are interested in the long-term behavior of the gene frequencies when Mendel's law of segregation does not hold. This results in a voter type model depending on four parameters; each of these parameters measures the strength of...
Source: http://arxiv.org/abs/0910.4009v1
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45
Sep 22, 2013
09/13
by
N. Lanchier; C. Neuhauser
texts
eye 45
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Mutualists and pathogens, collectively called symbionts, are ubiquitous in plant communities. While some symbionts are highly host-specific, others associate with multiple hosts. The outcomes of multispecies host-symbiont interactions with different degrees of specificity are difficult to predict at this point due to a lack of a general conceptual framework. Complicating our predictive power is the fact that plant populations are spatially explicit, and we know from past research that explicit...
Source: http://arxiv.org/abs/math/0603335v1
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10.0
Apr 21, 2020
04/20
by
Neuhauser, Sigrid; Kirchmair, Martin
texts
eye 10
favorite 0
comment 0
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44
Sep 19, 2013
09/13
by
N. Lanchier; C. Neuhauser
texts
eye 44
favorite 0
comment 0
Competition is a major force in structuring ecological communities. The strength of competition can be measured using the concept of a niche. A niche comprises the set of requirements of an organism in terms of habitat, environment and functional role. The more niches overlap, the stronger competition is. The niche breadth is a measure of specialization: the smaller the niche space of an organism, the more specialized the organism is. It follows that, everything else being equal, generalists...
Source: http://arxiv.org/abs/math/0610227v1
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10.0
Apr 21, 2020
04/20
by
Kirchmair, Martin; Neuhauser, Sigrid
texts
eye 10
favorite 0
comment 0
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45
Sep 18, 2013
09/13
by
Igor V. Ovchinnikov; Daniel Neuhauser
texts
eye 45
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comment 0
We reformulate 1D boson-fermion duality in path-integral terms. The result is a 1D counterpart of the boson-fermion duality in the 2D Chern-Simons gauge theory. The theory is consistent and enables, using standard resummation techniques, to obtain the long-wave-length asymptotics of the collective mode in 1D boson systems at the Tonks-Girardeau regime. The collective mode has the dispersion of Bogoliubov phonons: $\omega(q)=q \sqrt{\bar\rho U(q)/m}$, where $\bar\rho$ is the bosons density and...
Source: http://arxiv.org/abs/cond-mat/0502600v1
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Sep 22, 2013
09/13
by
B. Posselt; R. Neuhäuser; F. Haberl
texts
eye 57
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Context: Only two planetary systems around old ms-pulsars are currently known. Young radio pulsars and radio-quiet neutron stars cannot be covered by the usually-applied radio pulse timing technique. However, finding substellar companions around these neutron stars would be of great interest -- not only because of the companion's possible exotic formation but also due to the potential access to neutron star physics. Aims: We investigate the closest young neutron stars to search for substellar...
Source: http://arxiv.org/abs/0811.0398v1
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2.0
Jun 29, 2018
06/18
by
Daniel Neuhauser; Roi Baer; Dominika Zgid
texts
eye 2
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The second-order Green's function method (GF2) was shown recently to be an accurate self-consistent approach for electronic structure of correlated systems since the self-energy accounts for both the weak and some of the strong correlation. The numerical scaling of GF2 is quite steep however, $O({N^5})$ (where the pre-factor is often hundreds), effectively preventing its application to large systems. Here, we develop a stochastic approach to GF2 (sGF2) where the self-energy is evaluated by a...
Topics: Computational Physics, Condensed Matter, Physics, Mesoscale and Nanoscale Physics, Chemical...
Source: http://arxiv.org/abs/1603.04141
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43
Sep 23, 2013
09/13
by
M. Seeliger; R. Neuhäuser; T. Eisenbeiss
texts
eye 43
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We report on the results of the spectroscopy of 10 objects previously classified as brown dwarf candidates via RIJHK colors by Eisenbeiss et al. (2009), who performed deep imaging observations on a 0.4 sq.deg. field at the edge of the Pleiades. We describe and judge on classification techniques in the region of M-type stars. To classify and characterise the objects, visual and near infrared spectra have been obtained with VLT FORS and ISAAC. The spectral classification was performed using the...
Source: http://arxiv.org/abs/1110.4195v1
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Sep 21, 2013
09/13
by
T. O. B. Schmidt; R. Neuhäuser
texts
eye 41
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We have searched for close and faint companions around T Tauri stars in the Chamaeleon star forming region. Two epochs of direct imaging data were taken with the VLT Adaptive Optics instrument NaCo in February 2006 and March 2007 in Ks band for the classical T Tauri star CT Cha together with a Hipparcos binary for astrometric calibration. Moreover a J band image was taken in March 2007 to get color information. We found CT Cha to have a very faint companion (Ks{0} = 14.6 mag) of ~ 2.67"...
Source: http://arxiv.org/abs/0905.1921v1
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67
Jan 10, 2012
01/12
by
Kovner, Anthony R; Neuhauser, Duncan, 1939-
texts
eye 67
favorite 0
comment 0
Bibliography: p. [476]-491
Topics: Health facilities, Health services administration, Hospitals, Health Services, Hospital...
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37
Sep 18, 2013
09/13
by
T. Roell; A. Seifahrt; R. Neuhäuser
texts
eye 37
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comment 0
We present our search program for substellar companions using high-precision relative astronomy. Due to its orbital motion around the star, an unseen substellar companion would produce a periodic "wobble" of the host star, which is the astrometric signal of the unseen companion. By measuring the separation between the components of stellar double and triple systems, we want to measure this astrometric signal of a possible unseen companion indirectly as a relative and periodic change...
Source: http://arxiv.org/abs/0803.4159v1
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42
Sep 22, 2013
09/13
by
Brigitte König; Ralph Neuhäuser; Valeri Hambaryan
texts
eye 42
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Flare stars were discovered in the late 1940s in the solar vicinity and were named UV Cet-type variables (classical FSs). Among the FSs within 100 pc we search for young stars. For the search we take spectra with sufficient resolution to resolve Lithium at 6707 \AA and Calcium at 6718 \AA of all the stars. The real young stars are prime targets for the search of extra-solar planets by direct imaging.
Source: http://arxiv.org/abs/astro-ph/0106178v1
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Sep 21, 2013
09/13
by
Franz Lehner; Markus Neuhauser; Wolfgang Woess
texts
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Let $G$ be a finitely generated group and $X$ its Cayley graph with respect to a finite, symmetric generating set $S$. Furthermore, let $H$ be a finite group and $H \wr G$ the lamplighter group (wreath product) over $G$ with group of "lamps" $H$. We show that the spectral measure (Plancherel measure) of any symmetric "switch--walk--switch" random walk on $H \wr G$ coincides with the expected spectral measure (integrated density of states) of the random walk with absorbing...
Source: http://arxiv.org/abs/0712.3135v2
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6.0
Jun 26, 2018
06/18
by
Eran Rabani; Roi Baer; Daniel Neuhauser
texts
eye 6
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A time-dependent formulation for electron-hole excitations in extended finite systems, based on the Bethe-Salpeter equation (BSE), is developed using a stochastic wave function approach. The time-dependent formulation builds on the connection between time-dependent Hartree-Fock (TDHF) theory and configuration-interaction with single substitution (CIS) method. This results in a time dependent Schr\"odinger-like equation for the quasiparticle orbital dynamics based on an effective...
Topics: Chemical Physics, Physics, Computational Physics, Condensed Matter, Materials Science
Source: http://arxiv.org/abs/1502.02784
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Sep 20, 2013
09/13
by
Laurent Bartholdi; Markus Neuhauser; Wolfgang Woess
texts
eye 43
favorite 0
comment 0
Let T_1,..., T_d be homogeneous trees with degrees q_1+1,..., q_d+1>=3, respectively. For each tree, let h:T_j->Z be the Busemann function with respect to a fixed boundary point (end). Its level sets are the horocycles. The horocyclic product of T_1,...,T_d is the graph DL(q_1,...,q_d) consisting of all d-tuples x_1...x_d in T_1x...xT_d with h(x_1)+...+h(x_d)=0, equipped with a natural neighbourhood relation. In the present paper, we explore the geometric, algebraic, analytic and...
Source: http://arxiv.org/abs/math/0601417v1
3
3.0
Jun 30, 2018
06/18
by
Daniel Neuhauser; Roi Baer; Eran Rabani
texts
eye 3
favorite 0
comment 0
We develop a method in which the electronic densities of small fragments determined by Kohn-Sham density functional theory (DFT) are embedded using stochastic DFT to form the exact density of the full system. The new method preserves the scaling and the simplicity of the stochastic DFT but cures the slow convergence that occurs when weakly coupled subsystems are treated. It overcomes the spurious charge fluctuations that impair the applications of the original stochastic DFT approach. We...
Topics: Physics, Chemical Physics, Materials Science, Computational Physics, Condensed Matter
Source: http://arxiv.org/abs/1406.2782
Bibliography: p. 94-96
Topics: Mammals -- Afghanistan, Mammals -- Iran, Vespertilionidae
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Sep 20, 2013
09/13
by
Andreas Seifahrt; Ralph Neuhäuser; Markus Mugrauer
texts
eye 39
favorite 0
comment 0
Gizis et al. (2001) reported a companion candidate of spectral type L1 near the K2 dwarf GJ 1048 using the Two Micron All-Sky Survey (2MASS). At that time it was not possible to verify companionship astrometrically using the 2MASS data alone due to the small proper motion of GJ 1048. We now show that both objects share the same proper motion by using data from the UK Schmidt Telescope Near-infrared (IVN) Southern Survey as the first epoch and data from 2MASS as the second epoch. Our technique...
Source: http://arxiv.org/abs/astro-ph/0404252v1
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34
Sep 18, 2013
09/13
by
R. Neuhäuser; T. O. B. Schmidt
texts
eye 34
favorite 0
comment 0
Searching the literature, we found 25 stars with directly imaged planets and candidates. We gathered photometric and spectral information for all these objects to derive their luminosities in a homogeneous way, taking a bolometric correction into account. Using theoretical evolutionary models, one can then estimate the mass from luminosity, temperature, and age. According to our mass estimates, all of them can have a mass below 25 Jup masses, so that they are considered as planets.
Source: http://arxiv.org/abs/1201.3537v1
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51
Jul 20, 2013
07/13
by
N. Tetzlaff; R. Neuhäuser; M. M. Hohle
texts
eye 51
favorite 0
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Traditionally runaway stars are O and B type stars with large peculiar velocities.We want to extend this definition to young stars (up to ~50 Myr) of any spectral type and identify those present in the Hipparcos catalogue applying different selection criteria such as peculiar space velocities or peculiar one-dimensional velocities. Runaway stars are important to study the evolution of multiple star systems or star clusters as well as to identify origins of neutron stars. We compile distances,...
Source: http://arxiv.org/abs/1007.4883v2
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3.0
Jun 30, 2018
06/18
by
Yi Gao; Daniel Neuhauser; Roi Baer; Eran Rabani
texts
eye 3
favorite 0
comment 0
A stochastic approach to time-dependent density functional theory (TDDFT) is developed for computing the absorption cross section and the random phase approximation (RPA) correlation energy. The core idea of the approach involves time-propagation of a small set of stochastic orbitals which are first projected on the occupied space and then propagated in time according to the time-dependent Kohn-Sham equations. The evolving electron density is exactly represented when the number of random...
Topics: Physics, Chemical Physics, Other Condensed Matter, Mesoscale and Nanoscale Physics, Condensed Matter
Source: http://arxiv.org/abs/1410.6133
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46
Sep 21, 2013
09/13
by
T. O. B. Schmidt; R. Neuhäuser; A. Seifahrt
texts
eye 46
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We present a compilation of the planet candidates currently known from direct imaging. We have gathered available data from the literature and derive the luminosity of all candidates in a homogeneous way using a bolometric correction, the distances and the K band magnitudes of the objects. In a final step we find the masses of the candidates from a comparison of the luminosity or, if not available, an absolute brightness and several well known hot-start evolutionary models.
Source: http://arxiv.org/abs/0905.0439v2
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42
Sep 20, 2013
09/13
by
N. Timoney; V. Elman; W. Neuhauser; Chr. Wunderlich
texts
eye 42
favorite 0
comment 0
Coherent operations constitutive for the implementation of single and multi-qubit quantum gates with trapped ions are demonstrated that are robust against variations in experimental parameters and intrinsically indeterministic system parameters. In particular, pulses developed using optimal control theory are demonstrated for the first time with trapped ions. Their performance as a function of error parameters is systematically investigated and compared to composite pulses.
Source: http://arxiv.org/abs/quant-ph/0612106v1
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2.0
Jun 30, 2018
06/18
by
M. Kitze; R. Neuhäuser; V. Hambaryan; C. Ginski
texts
eye 2
favorite 0
comment 0
An investigation of the G-type stellar population with Kepler (as done by Maehara et al.) shows that less than 1 per cent of those stars show superflares. Due to the large pixel scale of Kepler ($\sim4 arcsec \: px^{-1}$), it is still not clear whether the detected superflares really occur on the G-type stars. Knowing the origin of such large brightenings is important to study their frequency statistics, which are uncertain due to the low number of sun-like stars ($T_{eff} = 5600-6000 \:K$ and...
Topics: Earth and Planetary Astrophysics, Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1408.2688
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3.0
Jun 30, 2018
06/18
by
N. Tetzlaff; G. Torres; A. Bieryla; R. Neuhäuser
texts
eye 3
favorite 0
comment 0
We report new radial velocity measurements for 30 candidate runaway stars. We revise their age estimates and compute their past trajectories in the Galaxy in order to determine their birthplaces. We find that seven of the stars could be younger than ~100 Myr, and for five of them we identify multiple young clusters and associations in which they may have formed. For the youngest star in the sample, HIP 9470, we suggest a possible ejection scenario in a supernova event, and also that it may be...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1409.0822
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74
Sep 19, 2013
09/13
by
V. Joergens; Matilde Fernandéz; Ralph Neuhäuser; Eike Guenther
texts
eye 74
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A photometric monitoring campaign of brown dwarfs in the ChaI star forming region in the i and R band revealed significant periodic variations of the three M6.5-M7 type brown dwarf candidates ChaHa2, 3 and 6 (Joergens et al. 2002). These are the first rotational periods for very young (1-5 Myr) brown dwarfs and among the first rotational periods for brown dwarfs at all. The relatively long periods of 2.2 to 3.4 days as well as vsini values (Joergens & Guenther 2001) indicate that our...
Source: http://arxiv.org/abs/astro-ph/0206137v1
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3.0
Jun 30, 2018
06/18
by
J. G. Schmidt; M. M. Hohle; R. Neuhäuser
texts
eye 3
favorite 0
comment 0
We spatially and temporally resolve the future Supernova (SN) rate in the Solar vicinity and the whole Galaxy by comparing observational parameters of massive stars with theoretical models for estimating age and mass and, hence, the remaining life-time until the SN explosion. Our SN rate derived in time and space for the future (few Myr) should be the same as in the last few Myr by assuming a constant rate. From BVRIJHK photometry, parallax, spectral type, and luminosity class we compile a...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1409.3357
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2.0
Jun 28, 2018
06/18
by
Daniel Neuhauser; Eran Rabani; Yael Cytter; Roi Baer
texts
eye 2
favorite 0
comment 0
We develop a stochastic formulation of the optimally-tuned range-separated hybrid density functional theory which enables significant reduction of the computational effort and scaling of the non-local exchange operator at the price of introducing a controllable statistical error. Our method is based on stochastic representations of the Coulomb convolution integral and of the generalized Kohn-Sham density matrix. The computational cost of the approach is similar to that of usual Kohn-Sham...
Topics: Computational Physics, Materials Science, Condensed Matter, Mesoscale and Nanoscale Physics,...
Source: http://arxiv.org/abs/1510.08519
